I have enough experience with computer modeling to know how much even minute variations in collected data can affect the outcome. I also know from the models with which I am familiar (predicting hydraulic behavior in water distribution systems) that the more complex the system the more likely the model's predictions are to be false. From this knowledge alone I was highly skeptical of Mann's work from the very beginning.

But to me the most telling factor is human behavior. If the Al Gores of the world were REALLY concerned they would stop flying private jets all over hell and half of Georgia to go to AGW conventions. They wouldn't be buying million dollar houses within spitting distance of the ocean.

And most telling of all, follow the money if you want to know the truth. Who profits from gubmint intervention? Take the Keystone project as an example. Warren Buffet's companies own a huge amount of railroad stock in rail lines that transport oil from the tar sands to the US. One of Buffet's foundations has been a primary contributor to enviro-whacko groups that actively oppose the Keystone project.

If Buffet were so concerned about the environmental impact of the tar sands, he wouldn't make millions on their rail tanker business, right?

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